The ECC is in a "re-learn", it can easily take it a couple dozen cold starts to get the air door to find the right position for operating. That fix you are talking about is for when the car is heating just fine, but for some reason the temp light still goes into the blinking mode. See what happens, but we may have to do the wrench through the glove box to get the door right. That'll mean you have a crack is the plastic gear for the actuator arm. While you are still trying to see if the ECC will learn, be sure your selected temperature is over 80, but NOT equal to 90. It''ll make the process go faster.
The important question... are you losing coolant onto the engine or ground, or is it just disappearing?
1995 SE ..Green and Rattle Can...234K mi...Bonnie (she'll outlive me)
1998 SSEI .. White ..119K mi...Evey
1996 SSE ..MajTeal..157K mi...4/12- Dealer trade full of Lucas Trans fix